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OOP LEC [FA3]
CCS0023 / CS0070
| Question | Answer |
|---|---|
| True or False: This line of code is correct System.out.println("Hi!"); | True |
| State of an object are also known as | Properties |
| When we want to print in Java, we use the code ...... | System.out.println(); |
| ________ describes the task to be performed on objects. | OOP |
| [True or False] Constructor – declared either at the start or end of a class definition. These variables identify the data stored in the object. | False |
| [True or False] Instance Variables are variables stored in the class and are available to all objects of a class or objects of other classes if access is permitted | False |
| a method that is accessible within and outside the package but through inheritance only. | Protected |
| Constructor – a method that is automatically executed when an object is created. This method is used to initialize the attributes. | True |
| static Variable used in defining a class variable | True |
| Encapsulation is implemented by using__________ | Private |
| Encapsulation is also called as? | Data Hiding |
| [True or False] Encapsulation is the way to add functions in a user defined structure. | False |
| [True or False] In Inheritance, the programmer can change one part of the code without affecting other parts | False |
| In Encapsulation, Class variables can be made read-only or write-only | True |
| If a derived class object is created, which constructor is called first? | Base class constructor |
| Which programming language doesn't support multiple inheritance? | Java |
| [True or False] In hierarchical inheritance, all the classes involve some kind of inheritance. | False |
| If base class contains 2 nested classes, will it be possible to implement single level inheritance? | Yes, always |
| [True or False or Sometimes] Encapsulation means "open to all" and indicates that the internal workings of an object are entirely visible to the outside world. | False |
| [True or False] Procedural Programming describes the task to be performed on objects. | False |
| What is the difference between a class and an object? | A class is a blueprint to make an object |
| Which one of these is a data type? Group of answer choices byte gold fold bit | Byte |
| [True or False] Access (Getter) – a method that is used to access or retrieve data. | False |
| [True or False] this keyword can be passed as argument in the constructor call. | True |
| [True or False] this keyword can be used to invoke current class method (implicitly) | True |
| [True or False] this keyword can be passed as an argument in the method call. | True |
| _________– implement the business rules for which the application is being developed Group of answer choices Custom Methods Standard Methods Constructor Method | Custom Methods |
| [True or False] Encapsulation is implemented by using private | True |
| [True or False ] There is an Increased security of data with Encapsulation | True |
| Which language doesn't support single level inheritance? Group of answer choices Java All languages support it C++ Kotlin | All languages support it |
| How can you make the private members inheritable? | It can be done both by making the visibility mode public or protected |
| Which among the following best defines single level inheritance? | A class inheriting a base class |
| Members which are not intended to be inherited are declared as ________________ | Private members |
| If multi-level inheritance is used, First class B inherits class A, then C inherits B and so on. Till how many classes can this go on? | There is no limit |
| Which of following statement(s) can result in new object instance creation if executed successfully. | All |
| What is it called where child object gets killed if parent object is killed? Group of answer choices Aggregation Composition Encapsulation Association | Composition |
| Sally is writing some Object-Oriented Program code for a vehicle which contains the attributes (manufacturer, color, and price), along with what she wants the vehicle to be able to do (start, drive, and park). This is known as _____. | method |
| [True or False] Standard Methods – implement the business rules for which the application is being developed | false |
| [True or False] this keyword can also be used to return the current class instance | True |
| [True or False] this() can be used to invoke current class constructor. | True |
| a variable that is accessible within and outside the package but through inheritance only. | protected variable |
| [True or False] Abstraction is the way to add functions in a user defined structure. | False |
| The encapsulation is achieved by combining which ones into a class? | Methods and Attribute |
| [True or False] In Encapsulation, the programmer can change one part of the code without affecting other parts | True |
| Which type of inheritance cannot involve private inheritance? | All types can have private inheritance |
| How many classes can be inherited by a single class in java? | Only 1 |
| Which among the following is correct for a hierarchical inheritance? | One base class can be derived into other two derived classes or more |
| Which constructor will be called first from the classes involved in single inheritance from object of derived class? | Base class constructor |
| Sally is continuing work on her Object-Oriented Program and is writing code for a car, truck, and bus. These items under the class called vehicle are referred to as _____. | class? |
| Which of the following is not OOPS concept in Java? | Compilation |
| [True or False] Procedural Programming is a technique of solving a problem and breaking it down into smaller parts and solving each of the smaller problems. | True |
| [True or False] The focus of procedural programming is to break down a programming task into a collection of variables, data structures, and subroutines | True |
| When does method overloading is determined? | At compile time |
| ________ – a method that is automatically executed when an object is created. This method is used to initialize the attributes. | Constructor |
| [True or False] Class Variables are variables stored in each object of a class, usually referred to as the non-static member fields of a class. | False |
| [True or False] Instance Variables are variables stored in each object of a class, usually referred to as the non-static member fields of a class. | True |
| Encapsulation is supported by ___________ | Classes |
| [True or False] Encapsulation has Better control of class attributes and methods | True |
| [True or False] Encapsulation has poor control of class attributes and methods | False |
| Which among the following best describes encapsulation? | It is a way of combining various data members and member functions that operate on those data members into a single unit |
| If class A and class B are derived from class C and class D, then ________________ | Those are 2 pairs of single inheritance |
| ________ is a technique of solving a problem and breaking it down into smaller parts and solving each of the smaller problems. | Procedural programming |
| Which of the following is a type of polymorphism in Java? | Compile time polymorphism |
| As a blueprint is a design for a house, a class is a design for a: | object |
| [True or False] // allows for a single line comment? | True |
| a method that is only accessible within the class where it is declared. | private method |
| ___________– a method that is used to change the data. | Mutator (Setter) |
| [True or False] non-static Variables are variables stored in each object of a class, usually referred to as the non-static member fields of a class. | True |
| [True or False] Standard Methods – used to change or access the private data in an object. | True |
| Which among the following should be encapsulated? | The data which is prone to change is near future |
| [True or False] There is no security of data with Encapsulation | False |
| Single level inheritance will be best for___________ | Inheriting a class which performs all the calculations |
| Which among the following best describes the Inheritance? | Using the data and functions into derived segment |
Created by:
AdoKwatro